人字形支护结构内力与变形分析及应用  

Analysis and Application of Internal Force and Deformation of Herringbone Bracing Structure

作　　者：刘杰[1] 罗鑫 周伟[1] 贺斯顿 

机构地区：[1]湖南工业大学土木工程学院,湖南 株洲

出　　处：《土木工程》2019年第10期1438-1447,共10页Hans Journal of Civil Engineering

基　　金：国家自然科学基金资助项目(NO:51978260)。

摘　　要：课题组在归纳、分析和整理双排桩支护结构特点的基础上,提出了人字形支护结构,它作为一种全新的深基坑支护结构形式,目前尚无简单而有效的设计计算方法。本文基于Winkler地基梁的基本思想,在忽略排桩与土竖向摩擦效应及空间效应下,考虑斜向加筋水泥土墙与土的摩擦作用,建立了考虑桩土效应的人字形支护结构平面杆系有限元模型,构建了人字形支护结构工作性状分析的整体刚度矩阵,编制了相应的Matlab计算程序,并通过工程案例进行了内力及变形分析。工程计算结果表明,计算位移与监测位移具有较好的一致性,计算内力有较好的规律性和可比性,可供人字形支护结构设计参考。On the basis of summarizing, analyzing and sorting out the characteristics of double-row pile supporting structure, the subject group puts forward the herringbone supporting structure, which is a new form of deep foundation pit supporting structure. In this paper, based on the ba-sic idea of Winkler foundation beam, the vertical friction effect between row piles and soil and the space effect are neglected, and the friction effect between inclined reinforced cement-soil Wall and soil is considered. The plane finite element model of herringbone bracing structure considering pile-soil effect is established, and the global stiffness Matrix of herringbone bracing structure is constructed, and the corresponding Matlab Program is compiled. The analysis of in-ternal force and deformation is carried out through an engineering case. The results show that the calculated displacement is consistent with the measured displacement, and the internal force is regular and comparable, which can be used as a reference for the design of herringbone bracing structure.

关 键 词：人字形支护结构 有限元法 WINKLER地基 弹性抗力系数 

分 类 号：TD3[矿业工程—矿井建设]